Text After five days of intense RBD workshop session we came up with several studies regarding developable surface structures developed with parametric design tools i.e. Grasshopper for Rhino. Our proposal regards a programmable curtain reacting on site constrains of the lobby area of the architectural faculty TU Berlin. Consisting of a system of continious differentiating ribbons it seperates and creates space by filtering views through an emerging field of transparancy gradients.